An alloy of copper and tin used in gears and machine bearings.
•Solder
•Duralium
•Bronze
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Bronze in your answer......
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Gunmetal ingot is a related alloy in which the zinc is replaced by 2% lead; this makes the alloy easier to cast but it has less strength. Modified gunmetal contains lead in addition to the zinc; it is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc. It is used for gears and bearings.
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